Nitto-denko Corporation

Eiko Suefusa

Katsunori Takada

Yoshitsugu Kitamura

Keisuke Kimura

Shinobu Nagano

Youichirou Sugino

Hiroki Kuramoto

Seiji Umemoto

Kota Nakai

Naotaka Higuchi

Daisuke Ogomi

Tomoyuki Kimura

Yusuke Toyama

A pressure-sensitive-adhesive-layer-attached polarizing film is disclosed having an odd shape, and capable of reducing occurrence of a crack in a polarizer and preventing peeling and foaming of a pressure-sensitive adhesive layer and warpage of a polarizing film. This pressure-sensitive-adhesive-layer-attached polarizing film comprises a polarizing film, and a pressure-sensitive adhesive layer on one surface of the polarizing film. The pressure-sensitive-adhesive-layer-attached polarizing film has an odd shape other than a rectangular shape, and when a strain gauge is attached to a surface not having the pressure-sensitive adhesive layer of the polarizing film such that a measurement axis and an absorption axis of the polarizing film intersect at right angles and strain amounts are measured, a difference between a strain amount at &#x2212;40&#xb0; C. and a strain amount at 85&#xb0; C. is 3000&#x3bc;&#x3b5; or less, and the creep value of the pressure-sensitive adhesive layer at 85&#xb0; C. is 15-600 &#x3bc;m inclusive.

Pressure-sensitive-adhesive-layer-attached polarizing film, and image display device

There is provided a liquid crystal display apparatus having the following feature: although the liquid crystal display apparatus has a step between its display screen and outermost surface, the step is hardly recognized; and the liquid crystal display apparatus can achieve bright display. A liquid crystal display apparatus according to the present invention includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a cover sheet arranged on a viewer side of the liquid crystal cell, the cover sheet having a transmission portion at a position corresponding to a display region of the liquid crystal cell; and a second polarizer arranged on a viewer side of the cover sheet to cover the transmission portion, wherein an absorption axis direction of the first polarizer and an absorption axis direction of the second polarizer are substantially perpendicular to each other.

Liquid crystal display apparatus

There is provided a polarizing plate excellent in durability. A method of producing a polarizing plate according to an embodiment of the present invention includes: preparing a polarizing film laminate including a polarizer and a protective film arranged on at least one side of the polarizer; and shrinking the polarizing film laminate.

Method of producing polarizing plate

A primary object of the present invention is to provide a polarizing plate excellent in durability. A polarizing plate () according to an embodiment of the present invention includes: a polarizer (); and a protective film (and) arranged on at least one side of the polarizer (). The polarizing plate () has a dimensional change ratio of &#x2212;0.2% or more in a transmission axis direction thereof when the polarizing plate () cut into a size measuring 100 mm by 100 mm is bonded to a glass plate with a pressure-sensitive adhesive and the following operation is repeated 100 times: the polarizing plate () bonded to the glass plate is left to stand under an atmosphere at &#x2212;40&#xb0; C. for 30 minutes and then left to stand under an atmosphere at 85&#xb0; C. for 30 minutes.

Polarizing plate

There is provided a polarizer excellent in heat resistance. A polarizer according to an embodiment of the present invention includes a resin film containing iodine, wherein an end portion of the resin film has formed therein a high-concentration portion having a concentration of a substance that forms a counter ion of iodine higher than that of another portion.

Polarizer, polarizing plate, and method of producing polarizer

There is provided a liquid crystal display apparatus having the following feature: although the liquid crystal display apparatus has a step between its display screen and outermost surface, the step is hardly recognized; and the liquid crystal display apparatus can achieve bright display. A liquid crystal display apparatus according to the present invention includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a second polarizer arranged on a viewer side of the liquid crystal cell; a cover sheet arranged on a viewer side of the second polarizer, the cover sheet having an opening portion at a position corresponding to a display region of the liquid crystal cell; and a third polarizer arranged on a viewer side of the cover sheet to cover the opening portion, wherein the opening portion of the cover sheet is filled with a pressure-sensitive adhesive.

A liquid crystal display apparatus includes a liquid crystal cell; a first polarizer arranged on a back surface side of the liquid crystal cell; a second polarizer arranged on a viewer side of the liquid crystal cell; a cover sheet arranged on a viewer side of the second polarizer, the cover sheet having a transmission portion at a position corresponding to a display region of the liquid crystal cell; a first optical compensation layer arranged on a viewer side of the cover sheet, the first optical compensation layer having an Re(550) of from 100 nm to 180 nm; and a third polarizer arranged on a viewer side of the first optical compensation layer, wherein an angle formed by a slow axis direction of the first optical compensation layer and an absorption axis direction of the third polarizer is from 35&#xb0; to 55&#xb0; or from 125&#xb0; to 145&#xb0;.

There is provided a polarizing plate which is imparted durability. A polarizing plats with a pressure-sensitive adhesive, layer according to an embodiment of the present invention includes: a polarizing plate including a polarizer and a protective film arranged on at least one side of the polarizer; and a pressure-sensitive adhesive layer formed on at least one surface of the polarizing plate, wherein in the surface of the polarizing plate where the pressure-sensitive adhesive layer is formed, a non-contact portion that is out of contact with the pressure-sensitive adhesive layer is formed in an end portion of the polarizing plate.

Growing community of inventors

Ibaraki, Japan

Eiko Suefusa